:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --light-bg: #f8f9fa;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui;
        }
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f0f2f5;
            padding: 2rem 0;
        }
        .container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            padding: 2rem;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            border-radius: 8px;
        }
        .header {
            text-align: center;
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--light-bg);
        }
        .name {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        .contact-info {
            color: #666;
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .section {
            margin: 2rem 0;
            padding: 1rem;
            background: var(--light-bg);
            border-radius: 6px;
        }
        .section-title {
            font-size: 1.4rem;
            color: var(--secondary-color);
            border-left: 4px solid var(--secondary-color);
            padding-left: 0.8rem;
            margin-bottom: 1rem;
        }
        /* 可展开区块的标题样式 */
        .collapsible .section-title {
            cursor: pointer;
            transition: all 0.3s;
        }
        .toggle-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        .timeline-item {
            margin: 1rem 0;
            padding-left: 1rem;
            border-left: 2px solid #ddd;
        }
        .project-item {
            background: white;
            padding: 1rem;
            border-radius: 6px;
            margin: 1rem 0;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }
        .skills {
            display: flex;
            gap: 0.8rem;
            flex-wrap: wrap;
        }
        .skill-item {
            background: var(--secondary-color);
            color: white;
            padding: 0.4rem 1rem;
            border-radius: 15px;
            font-size: 0.9rem;
        }
        .feedback-form {
            margin-top: 2rem;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        input, textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            margin-top: 0.5rem;
        }
        button {
            background: var(--secondary-color);
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: background 0.3s;
        }
        button:hover {
            background: #2980b9;
        }
        @media (max-width: 768px) {
            .container {
                margin: 0 1rem;
                padding: 1rem;
            }
            
            .name {
                font-size: 2rem;
            }
        }